Jessica Rips Carrie: Romo's Not Hung Up on You

Jessica Rips Carrie: Romo's Not Hung Up on You

8/21/2008 4:07 PM PDT BY TMZ STAFF

The other hot blonde fighting over the NFL's luckiest bastard, Tony Romo, just turned up the heat -- calling Carrie Underwood a boldfaced liar on live radio.

Jessica Simpson just went on "Woody and Jim" on 107.5 in Nashville, telling the morning crew she and Tony laughed at Carrie's published claim that Romo is still calling the Idol champ -- and adding that everything Carrie insinuated is completely untrue.

And if that wasn't clear enough, Simpson spelled it right out for Underwood, "If Tony wanted to call her ... or wanted to be with her, he would."